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Posted by 02
on 12/1/2007, 5:21 pm, in reply to "The diminished chord, 4 notes or 3?"
71.195.183.87
No problem here. The two chords sound pretty much the same, especially on guitar. TRIADS are three note chords, and if you play B-D-F at the same time, you get a diminished triad.
Music history, practice, and theory dictate that a four note chord that includes 3 notes of a triad and a note a seventh above the root is a seventh chord. There are many types of seventh chords, include the fully diminished 7th chord you described. There is also a half-diminished 7th chord (C-Eb-Gb-Bb). This chord has a major third between the Gb and the Bb (or the 5th and the 7th), and is "diatonic" to the major key, in this case, Db major.
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